KR101444086B1 - Multiphase cosmetic composition containing UV blocking agents - Google Patents

Abstract

The present invention relates to a multi-layered cosmetic composition comprising an ultraviolet screening agent. More particularly, the present invention relates to a multi-layer cosmetic composition comprising an ultraviolet screening agent layer containing a surfactant and a salt- Layer structure having two or more layers that are clearly separated from each other at the boundary of the aqueous phase and then shaking it, it is possible to obtain a multi-layered structure which is excellent in redispersibility of the ultraviolet screening agent and mixed in a single- Cosmetic composition.

Lipid barrier, multilayer, cosmetic composition

Description

[0001] Multiphase cosmetic composition containing UV blocking agents [0002]

The present invention relates to a multi-layered cosmetic composition comprising an ultraviolet screening agent. More particularly, the present invention relates to a multi-layer cosmetic composition comprising an ultraviolet screening agent layer containing a surfactant and a salt- Layer structure having two or more layers that are clearly separated from each other at the boundary of the aqueous phase and then shaking it, it is possible to obtain a multi-layered structure which is excellent in redispersibility of the ultraviolet screening agent and mixed in a single- Cosmetic composition.

The ultraviolet rays occupy 10% energy of the solar radiation as sun rays in the wavelength range of 280 to 400 nm. The action of ultraviolet rays is sterilization, treatment of dermatosis and helps skin tanning to express healthiness, and has a big role in the synthesis of vitamin D, which is essential for human body. On the other hand, dry skin darkening, skin irritation and long-term effects of skin wrinkles, skin wrinkles and skin freckles are caused by hyperhidrosis, and it is also an important environmental factor of skin cancer. Generally, ultraviolet rays are classified into UV-C of 240-290 nm wavelength, UV-B of 290-320 nm wavelength and UV-A of 320-400 nm wavelength depending on the wavelength. UV-C passes through the ozone layer and disappears without reaching the surface. UV-B penetrates into the epidermis of the skin, causing erythema, freckles and edema. UV-A penetrates the skin's dermis and promotes skin cancer, wrinkles and melanin formation, leading to skin aging and skin irritation.

At present, UV absorbers and inorganic UV scattering agents are widely used. Ultraviolet rays generate free radicals and free radicals in the body. The body uses antioxidant enzymes such as SOD, catalase and peroxidase, and antioxidants such as vitamin E, vitamin C, glutathione and ubiquinone, Lt; / RTI > However, when the production of active oxygen exceeds the bio-defense capability due to physical and chemical factors, oxidative stress is caused. To eliminate this, it is desired to produce a hypothetical and visually distinctive composition at a reasonable price for consumers . One method of making cost effective hypoallergenic compositions is to minimize the level of surfactant. However, minimization of the level of surfactant may cause instability of the surfactant, which is further exacerbated by the addition of an organic UV-blocking agent having a high polarity or an inorganic UV-blocking agent in the form of a solid powder.

Recently, cosmetic formulations of UV shielding products are mostly products containing additives such as organic UV blocking agent, inorganic UV blocking agent and large amount of surfactant. These formulations are also oil-dispersed, that is, water-dispersible, i.e., water-in-oil (W / O) products, in an oil-in-water (O / W) Due to the intrinsic nature of the molecular structure of organic and inorganic sunscreens, a large amount of surfactant assistance is required to maintain a stable emulsion form, and these products therefore have limited use in combination with each sunscreen. In order to increase the stability, cream formulations with high viscosity become main. Generally, the amount of surfactant and thickener used increases to stabilize the cream formulation. These cream formulations are highly viscous and thicker when applied, resulting in relatively more force than low viscosity formulations.

On the other hand, various functions of the composition are required along with the diversification of lifestyle, a visual effect which can give fun and pleasure to the appearance, and a composition which is excellent in feeling of use of light touch as an internal factor are required In fact. However, conventional products are simple emulsion formulations, and there is no apparent differentiation, and there is a limitation in realizing a feeling of feeling of light touch feel due to the large amount of additives such as surfactants.

Accordingly, the present inventors have made efforts to produce an ultraviolet screening composition having good feel and good transparency when applied with an ultraviolet screening agent. As a result, it has been found that the ultraviolet screening composition containing two layers Layer cosmetic composition of two or more layers has good feel upon use and excellent transparency, and thus the present invention has been completed.

Accordingly, an object of the present invention is to provide a multi-layered cosmetic composition which is excellent in redispersibility of an ultraviolet screening agent and has good gelling feeling and good transparency at the time of application without gelation or caking.

In order to achieve the above object, the present invention provides a water-repellent layer comprising a surfactant and a salt mixed therein; And an ultraviolet screening agent layer containing an ultraviolet screening agent.

The multi-layered cosmetic composition according to the present invention exhibited excellent feeling of use and ultraviolet ray blocking effect without causing gelation and caking, and was able to provide transparency, high UV index and natural feeling.

The present invention relates to a multi-layer cosmetic composition comprising an ultraviolet screening agent.

As used herein, the term "multi-layer image" refers to a structure in which the sunscreen phase and the structured aqueous phase are present in a state in which they occupy separate and distinct physical spaces within the package in which they are stored, but are in direct contact with each other.

The multi-layer cosmetic composition according to the present invention may have a two-layer structure in which an ultraviolet screening agent layer is formed on the image receiving layer. The composition according to the present invention may further comprise an ultraviolet screening agent layer (solid powder layer) And an ultraviolet screening agent layer (oil phase layer) containing an organic ultraviolet screening agent. At this time, the oil phase layer may further include dimethicone or cyclomethicone together with an organic UV blocking agent.

As the ultraviolet screening agent to be used in the present invention, it is possible to use a liquid organic ultraviolet screening agent having an ultraviolet ray absorbing effect. Specific examples thereof include ethylhexyl methoxycinnamate, isoamyl P-methoxycinnamate (ISOAMYL P -METHOXYCINNAMATE, bis-ethylhexyloxyphenol methoxyphenyl triazine, C12-15 alkyl benzoate / titanium oxide / aluminum stearate / polyhydroxy stearate / alumina (Alkyl Benzoate / In addition, organic UV absorbers such as oxybenzone, octocrylene, and the like, which are ultraviolet absorptive effect agents, can be given as examples of the ultraviolet absorbers. Examples of the ultraviolet absorbers include titanium oxides, aluminum stearate, polyhydroxystearic acid, and ethylhexyl salicylate. ), Diethylhexylbutamidotriazone, 4-methylbenzylidene camphor, 3-benzylidene Formate (3-benzylidene camphor), or the like can be used, octyl dimethyl PABA (Octyldimethyl PABA), no small-triazine (Anisotriazine) and the polysilicon 15 (Polysilicone 15).

In addition, the ultraviolet screening agent used in the present invention may be an inorganic ultraviolet screening agent such as an ultraviolet screening agent of a solid powder. Specific examples thereof include titanium dioxide, zinc oxide and the like. .

Such an ultraviolet screening agent can be used by adjusting its content according to a desired ultraviolet screening effect. In the present invention, the water-absorbing layer and the ultraviolet screening agent layer may be mixed in a weight ratio of 1: 1 to 6: 1. In order to form a multi-layered structure of three or more layers, dimethicone or cyclomethicone in the oil- It is preferable that the ratio of dimethicone: inorganic UV blocking agent: water-absorbing layer: organic UV blocking agent is contained in a weight ratio of 1: 0: 1: 1 to 1: 1: 1: 1, But is not limited thereto.

In the present invention, the water-repellent layer can be formed by appropriately mixing a surfactant and salts at a weight ratio of 1: 1 to 1.5. Such a water-repellent layer allows the boundary between the upper layer and the ultraviolet screening agent layer to be clearly separated when the composition is in a standing state, and when the composition is shaken, it is excellent in the redispersibility of the powder and becomes a cosmetic composition having good feel during use. That is, the water-absorbing layer and the ultraviolet screening agent layer according to the present invention are not separated by a specific barrier, and they are not emulsified or mixed to a significant degree.

Surfactants used in the present invention include alkyl glucoside surfactants such as decyl glucoside and laulyl glycoside; PEG-60 hydrogenated castor oil and octyldodeceth-16, among which decyl glucoside is most preferred. The content of the surfactant is preferably 0.1 to 1% by weight based on the total weight of the cosmetic composition.

The salts used in the present invention include potassium phosphate (POTASSIUM PHOSPHATE) and sodium chloride in an amount of 0.01 to 0.5 wt%, respectively, based on the total weight of the cosmetic composition.

The multi-layer cosmetic composition according to the present invention is a composition of a liquid or solid powder, and preferably has a viscosity of 600 400 cPs at 30 ° C. Further, the ultraviolet screening agent layer is stably disposed on the upper layer of the aqueous layer in the static state.

 As used herein, the term "stable ", unless otherwise specified, refers to caking at a temperature of 30 ° C with a viscosity of at least 3000 cPs or gelation of at least 7 Pa Or " solidified ") phenomenon. ≪ / RTI >

The multi-layered cosmetic composition of the present invention may further contain other ingredients such as an alcohol, an oil, an activator, a moisturizer, a drug, a sequestering agent, a polyol, an antioxidant, an antiseptic, Can be easily compounded.

The multi-layered cosmetic composition of the present invention can be formulated into cosmetic lotion, lotion, spray, cleansing oil, colon, fragrance or bath agent, and the sunscreen is located on different layers from the water layer, And a good feeling of use when applied to skin is obtained.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments.

[Examples 1 to 2 and Comparative Examples 1 to 4]

The ultraviolet screening base compositions of Examples 1 to 2 and Comparative Examples 1 to 4 were prepared with the compositions shown in Table 1 below.

Ingredient Name (INCI) Example
One Example
2 Comparative Example
One Comparative Example
2 Comparative Example
3 Comparative Example
4 Paid
(year
genus
Prize) Ethylhexyl methoxycinnamate 7 7 7 7 7 7 Isoamyl methoxycinnamate 9 9 9 9 9 9 Bis-ethylhexyloxyphenol methoxyphenyltriazine 3 3 3 3 3 3 C12-15 alkyl benzoate / titanium oxide / aluminum stearate / polyhydroxystearic acid / alumina 10 10 10 10 10 10 Ethylhexyl salicylate 5 5 5 5 5 5 Glyceryl stearate - - - - 3 3 Polysorbate 60 - - - - 2 2 Cetyl dimethicone copolymer - - 2 2 - - Carnauba wax - - 1.5 1.5 1.5 1.5 Dimethicone 20 20 20 20 20 20 Awards
(year
genus
Prize) water Balance Balance Balance Balance Balance Balance Sodium chloride 0.5 0.5 0.5 0.5 - - POTASSIUM PHOSPHATE MONOBASIC 0.3 0.3 - - - - Potassium phosphate
(POTASSIUM PHOSPHATE DIBASIC) 0.3 0.3 - - - - Decyl glucoside
(decylglucoside) 0.5 0.5 - - - - Awards
(minute
mountain
Prize) Titanium Dioxide / Hydrated Silica / Aluminum Hydroxide Fine Particles - 3 - 3 - 3

Examples 1 and 2 were prepared by weighing each component in a beaker, stirring the mixture at room temperature, and filling the container.

Comparative Examples 1 and 2 were prepared by dissolving the oil phase and the water phase at 75 to 80 DEG C as a conventional cosmetic base for water-in-UV sunscreening, slowly dispersing the oil phase into water, dispersing the mixture in a homogenizer, Comparative Example 2 was obtained by dispersing titanium dioxide / hydrated silica / aluminum hydroxide fine particles into the base of the cooled Comparative Example 1 and then filling the container.

Comparative Examples 3 to 4 were prepared by dissolving the oil phase part and water phase part at 75 to 80 DEG C as a conventional cosmetic base for underwater type ultraviolet screening, slowly dispersing the water phase part into the oil phase part, sufficiently dispersing the mixture in a homogenizer, , Comparative Example 4 was obtained by dispersing titanium dioxide / hydrated silica / aluminum hydroxide fine particles into the base of the cooled Comparative Example 3, and then filling the container. In the above, titanium dioxide acts as an ultraviolet ray blocking agent for reflection and scattering of ultraviolet rays, and hydrated silica and aluminum hydroxide are used for deactivating the photocatalytic activity of titanium dioxide.

[Test Example 1] Measurement of ultraviolet barrier index

The UV blocking indexes of Examples 1 and 2 and Comparative Examples 1 to 4 were as follows:

Subjects: 8 (6 males, 2 females)

Test site: the left and right parts except the spine part of the back

Light source: ORIEL Solar Simulator 81293 (Xenon UV Lamp 1KW, unfiltered)

Photometer: IL1733 Radiometer, SED 240 probe

≪ Measuring method of SPF >

The amount of ultraviolet light emitted from the solar simulator lamp was adjusted to 20-100 mJ / cm 2, and the light was irradiated to the back region of the subject. The minimum erythema (MED) after 24 hours of irradiation with ultraviolet light ). In order to confirm the ultraviolet blocking effect of the sample, the sample was uniformly coated on the back surface of the subject at a thickness of 2 μl / cm 2, left to stand for 15 minutes, and dried. The ultraviolet ray irradiation window was attached and fixed to the sample application areas of Examples 1 to 2 and Comparative Examples 1 to 4, and ultraviolet rays were irradiated to other portions except for the irradiation windows by cutting off ultraviolet rays using leather and a towel. The test was started with increasing doses of ultraviolet radiation, beginning with a dose of SPF 50 based on the subject's MED, an expected sample of SPF 15-40, an SPF 100 expected sample starting at SPF 40-65. The minimum erythema was determined after 24 hours of ultraviolet irradiation, and the ultraviolet blocking effect was calculated according to the following equation (1).

The results of measurement of the ultraviolet blocking effect (SPF) of Examples 1 and 2 and Comparative Examples 1 to 4 are shown in Table 2 below.

Test group Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 SPF (average) 45.1 49.8 43.6 51.9 35.2 42.5

From the results of Table 2, it was confirmed that the compositions of Examples 1 and 2 according to the present invention had a greater ultraviolet blocking effect than those of Comparative Examples 1 to 4.

[Test Example 2] Evaluation of long-term stability

The composition filled in the container was kept at 45 캜 for one month, and the container was shaken by a professional panel and the relocation of the ultraviolet screening agent was evaluated. The results are shown in Table 3 below:

○: Stable form without layer separation and gelation or caking phenomenon

◐: Gelled or caking (solidified) and uniformly dispersed on one occasion of severe shaking

●: Gelling or caking (solidifying) and not dispersing uniformly even with shaking

Test group Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Long-term stability ○ ○ ◐ ● ● ●

From the results shown in the above Table 3, it can be seen that the cosmetic compositions for blocking ultraviolet rays of the multi-layered structure prepared in Examples 1 and 2 of the present invention exhibit a similar or superior ultraviolet shielding effect to the cosmetic compositions of Comparative Examples 1 to 4, there was. However, as a result of observing the stability over a long period of time, Comparative Examples 1 to 4 were in an unstable state where gelation or caking occurred due to agglomeration of particles and recovery was not achieved even under severe shaking conditions. On the other hand, Examples 1 and 2, which are cosmetic compositions for blocking UV rays on a multilayered surface, maintained a stable state for a long period of time.

[Test Example 3] Visual effect preference, whitening phenomenon and feeling sensation test

In order to evaluate visual effect preference, whitening phenomenon and feeling of use of the cosmetic composition of the present invention, the ultraviolet barrier cosmetic composition prepared in Examples 1 to 2 and Comparative Examples 1 to 4 was subjected to a sensory test. Twenty women aged 25 to 35 were evaluated for their visual preference for filling of each cosmetic composition for ultraviolet screening and then applied to the skin of the hand according to the general usage method to evaluate the satisfaction with the whitening phenomenon and feelings Respectively. The sensory evaluation was carried out according to the blotting law standards of excellent (5 points), excellent (3 points), normal (0), poor (-3 points) and very poor (-5 points) Are shown in Table 4 below.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Whitening 4.9 3.3 4.4 -1.1 4.8 -2.5 Feeling 4.7 4.1 1.5 -2.5 2.0 3.5 Visual effect
preference 4.5 4.7 2.5 2.5 2.5 2.5

As shown in Table 4, the cosmetic compositions prepared in Examples 1 and 2, which are cosmetic compositions for blocking ultraviolet rays on a multi-layered surface, showed better visual effect preference and satisfactory satisfaction with use reduction than those of Comparative Examples 1 to 4, And satisfaction with whitening was also relatively good.

Claims (6)

1) a water phase layer mixed with a surfactant and salts; And 2) at least one layer of an ultraviolet screening agent comprising an ultraviolet screening agent; Including, Wherein the salts are a mixture of potassium phosphate (POTASSIUM PHOSPHATE) and sodium chloride (Sodium chloride). The composition of claim 1, wherein the surfactant is selected from the group consisting of decyl glucoside, laulyl glycoside, PEG-60 hydrogenated castor oil, and octyldodeceth-16 ≪ / RTI > delete The cosmetic composition according to claim 1, wherein the water-absorbent layer and the ultraviolet screening agent layer are constituted at a weight ratio of 1: 1 to 6: 1. The ultraviolet light blocking agent according to claim 1, wherein the ultraviolet light blocking agent is selected from the group consisting of Ethylhexyl Methoxycinnamate, ISOAMYL P-METHOXYCINNAMATE, Bis-ethylhexyloxyphenol methoxyphenyltriazine Bis - Ethylhexyloxyphenol Methoxyphenyl Triazine), C12-15 alkyl benzoate / titanium oxide / aluminum stearate / polyhydroxystearic acid / alumina (Alkyl Benzoate / Titanium Oxide / Aluminum Stearate / Polyhydroxystearic Acid / Alumina) Ethylhexyl Salicylate, Oxybenzone, Octocrylene, Diethylhexylbutamidotriazone, 4-methylbenzylidene camphor, 3-benzylidene camphor 3-benzylidene camphor, Octyldimethyl PABA, Anisotriazine, Polysilicone 15, Titanium dioxide and Zinc Oxide. A cosmetic composition characterized in that at least one member selected from the group true. The cosmetic composition according to any one of claims 1, 2, 4, and 5, wherein the cosmetic composition is formulated into a cosmetic lotion, lotion, spray, cleansing oil, colon, perfume or bath agent.